Flora of North America species comparison

few to several from base, erect to ascending, branched throughout, (0.7–)1–4.8(–6.1) dm.

simple from base, erect ascending, branched (several) distally, (0.5–)1–3.5(–5.5) dm.

often not rosulate;

petiole 1–6 cm;

blade pinnately lobed, (1–)1.5–8(–11) cm × (5–)10–35 mm, margins (of lobes) entire or denticulate.

rosulate;

petiole 1–3.2(–5.3) cm;

blade (1- or) 2- or 3-pinnatisect (lobes oblong), (1.5–)3–5(–7.2) cm, margins (of lobes) usually entire, rarely dentate.

sessile;

blade linear, (0.8–)1.3–7(–9.5) cm × (0.7–)1–2(–3) mm, base attenuate, not auriculate, margins entire.

sessile;

blade linear, (0.4–)1–2(–3) cm × 0.5–2.5(–3.5) mm, base cuneate, not auriculate, margins entire.

elongated in fruit;

rachis puberulent or glabrous.

considerably elongated in fruit;

rachis puberulent, trichomes straight, cylindrical.

sepals ovate to oblong, 1–2 × 0.8–1 mm;

petals white, suborbicular, 2–3 × 1–2 mm, claw 0.5–1.5 mm;

stamens 6;

filaments 1.5–2 mm, (glabrous);

anthers 0.2–0.4 mm.

sepals oblong, 0.5–0.9(–1) × 0.2–0.4 mm;

petals (absent or rudimentary), white, linear, 0.2–0.5 × 0.1 mm, claw absent;

stamens 2, median;

filaments 0.7–0.8 mm;

anthers 0.1–0.2 mm.

divaricate to horizontal, straight or recurved to somewhat sigmoid, (terete), 3.5–8(–11) × 0.2 mm, glabrous or puberulent adaxially.

divaricate to horizontal, straight, (terete), (1.5–)2–4(–5) × 0.1–0.15 mm, puberulent.

broadly ovate, 2–3.7(–4.3) × (1.5–)1.8–2.9(–3.4) mm, apically winged, apical notch 0.1–0.3(–0.4) mm deep;

valves thin, smooth, not veined, glabrous;

style 0.2–0.6 mm, exserted beyond apical notch.

elliptic, (1.5–)1.8–2.5(–3) × 1.5–2(–2.3) mm, apically winged, apical notch 0.1–0.2 mm deep;

valves thin, smooth, not veined, glabrous;

style obsolete or to 0.1 mm, included in apical notch.

ovate, 1.5–1.8(–2) × 0.9–1.2(–1.5) mm.

oblong to ovate-oblong, 1–1.5 × 0.6–0.8 mm.

= 32.

= 16, 32.